研究固体表面酸性分类的热化学方法

本文介绍一种研究复杂固体表面的酸性本质及其构成的热化学方法,它基于首先建立各类酸性(质子酸性,Lewis酸性和氢键酸性)以及色散作用的固体模型,然后测定所研究固体与一系列碱的反应热并将其与各模型固体与同一系列碱的反应热相比较,应用数学统计方法,得到所研究固体表面酸性的本质和各类酸性的定量组成,作为一个初步应用,研究了五种美国煤样的表面酸性,得到令人鼓舞的结果,虽然目前尚缺乏适当的Lewis酸固体模型,但可以预料,它极有希望发展成为研究复杂固体表面酸性分类和组成的普遍方法。

Thermodynamic Method for Studying Acidity Classification of Complex Solid Surface

In this paper, we introduced a new thermo chermical method for studying acidity classification of complex solid surface, which based on the establishment in advance of prototypes for various acidity(proton acidity, Lewis acidity and hydrogen bond acidity) and dispersion force interaction and on the comparison of the heats evolved when the solid was immersed in a series bases with the heats evolved by the several prototypes react on the same series bases. As an example, we studied the acidity classification of five American coal samples by the method abovementioned. Some interesting results have been obtained and a comparison of the use of these solid prototypes versus homogeneous analogues(e.g.Taft Kamletparameters) has been carried out. The results show that the thermochemical method abovementioned will be a very promising general method to study acidity essence and quantitative composition of various acidity on solid surface, although we still do not have an appropriate solid prototype for Lewis acidity at present and there are some problems have to further study.